1. School of Chemistry and Chemical Engineering, Pulp & Paper Engineering State Key Laboratory of China, South China University of Technology, Guangzhou 510640, P. R. China
2. Guangdong Key Laboratory of Water and Air Pollution Control, South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou 510655, P. R. China
3. Research Institute of Petroleum Processing Sinopec, Beijing 100083, P. R. China